<!DOCTYPE html>
<html>

<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link rel="stylesheet" href="../bootstrap-5.1.3-dist/css/bootstrap.css">
  <script src="../bootstrap-5.1.3-dist/js/bootstrap.js"></script>
</head>

<body class="container">
  <button class="btn btn-primary">
    <span class="spinner-border spinner-border-sm"></span>
  </button>
  <button class="btn btn-primary">
    <span class="spinner-border spinner-border-sm"></span>
    Loading..
  </button>
  <button class="btn btn-primary" disabled>
    <span class="spinner-border spinner-border-sm"></span>
    Loading..
  </button>
  <button class="btn btn-primary" disabled>
    <span class="spinner-grow spinner-grow-sm"></span>
    Loading..
  </button>
</body>

</html>